12278732 has 6 divisors (see below), whose sum is σ = 21487788. Its totient is φ = 6139364.

The previous prime is 12278729. The next prime is 12278737. The reversal of 12278732 is 23787221.

It is not an unprimeable number, because it can be changed into a prime (12278737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1534838 + ... + 1534845.

It is an arithmetic number, because the mean of its divisors is an integer number (3581298).

Almost surely, 2^12278732 is an apocalyptic number.

It is an amenable number.

12278732 is a deficient number, since it is larger than the sum of its proper divisors (9209056).

12278732 is a wasteful number, since it uses less digits than its factorization.

12278732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069687 (or 3069685 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 12278732 is about 3504.1021674603. The cubic root of 12278732 is about 230.7019011668.

The spelling of 12278732 in words is "twelve million, two hundred seventy-eight thousand, seven hundred thirty-two".